Answer:
swimming pool
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
The slope-intercept form of an equation of a line:

Parallel lines have the same slope. Therefore if given line is

then the slope of our line is  .
.
We have the equation:

The line passes through (-1, -7). Put the coordinsted pf the point to the equation:

 <em>add 2 to both sides</em>
          <em>add 2 to both sides</em>

Finally:

 
        
             
        
        
        
6.5c + 9.7a = 1721.4
a = 4c
6.5c + 9.7(4c) = 1721.4
6.5c + 38.8c = 1721.4
45.3c = 1721.4
c = 1721.4 / 45.3
c = 38...so there were 38 childrens' tickets <==
and 152 adult tickets
        
             
        
        
        
Answer:
parallel:

perpendicular:

Step-by-step explanation:
original line:
-7x + 8y = 4
m = 7/8
parallel: 
m = 7/8
L: 7x - 8y = k
(4, -4) -> L
28 + 32 = 60 = k
L: 7x - 8y = 60
perpendicular: 
m = -8/7
L: -8x + 7y = k
(4, -4) -> L
-32 + 28 = -4 = k
L: -8x -7y = -4 
=> 8x + 7y = 4